Answer:
The correct answer is - C. 2500 - 5000 Hz
Explanation:
According to the graph, there is the threshold of audibility curve that exhibits that at 2500 Hz and 5000 Hz, the lowest thresholds of audibility are present. So the sound that is faintest can be heard at 2500 Hz and 5000 Hz.
This is the reason that te humans are sensitive to the crying of the babies as they must cry at 2500 Hz and 5000 Hz frequency and we get their attention easily.
What is the frequency of a 6.43 x 10^-5 m wave?
Answer:2
Explanation:
Frequency is defined as repetitive occurrences per unit of time. The frequency of a 6.43 x 10⁻⁵ m wave is 4.67 × 10 ¹³ hertz.
What is the frequency?Frequency is given as the ratio of the wave speed (c) to the wavelength (λ).
υ = c ÷ λ
Given,
Speed of light (c) = 3.00 x 10⁸ m/s
Wavelength (λ) = 6.43 x 10⁻⁵ m
Substituting the values above,
υ = 3.00 x 10⁸m/s ÷ 6.43 x 10⁻⁵ m
= 4.67 × 10 ¹³ per sec
Therefore, 4.67 × 10 ¹³ Hz is the frequency.
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Bacteria Natural Selection
Answer:
Bacterial resistance arises through the simple process of natural selection. Bacteria divide rapidly, but DNA replication is imperfect. In the presence of antibiotics, while most bacteria are killed, a small number of resistant mutants may survive and take over.
Explanation:
Question 4
2 pts
The number of chemical industries along Florida's rivers is increasing. What is the most
likely consequence of this increased industrialization?
O a decrease in the amount of water pollution
O an increase in the amount of water available for recreational use
an increase in the destruction of natural food webs
O a decrease int he amount of water needed by industry
Answer:
The correct answer would be - an increase in the destruction of natural food webs.
Explanation:
Increasing chemical industries near the river cause harmful effects to the environment by various means, including air pollution, dumping untreated chemical or industrial waste, and wastewater in the river. This will lead to a lack of potable water, contamination of the food chain, destruction of biodiversity, and many more.
The destruction of biodiversity can be caused by the increasing the unbridled growth of phytoplankton, eutrophication process that will consume more oxygen and cause algal bloom and decrease the oxygen in the water and destroys the organism and natural food web.
which of the following statements explains why there is so much nutrition and health misinformation? check all that apply.
a. Promoters use of pseudoscience in their ads. b. The general public lacks a basic understanding of science, and particularly, how the body functions. c. Promoters often spread false information that fosters consumers' msitrust of the scientific community d. Over the past century, conventional medical care has done little to improve the health of most Americans
The statement b. The general public lacks a basic understanding of science, and particularly, how the body functions. c. Promoters often spread false information that fosters consumers' mistrust of the scientific community explains why there is so much nutrition and health misinformation.
The prevalence of nutrition and health misinformation can be attributed to multiple factors, including the use of pseudoscience in promotions, a lack of basic scientific understanding among the general public, the spread of false information by promoters fostering mistrust of the scientific community, and the perceived failure of conventional medical care to significantly improve the health of many Americans.
1. Promoters' Use of Pseudoscience: One reason for the abundance of nutrition and health misinformation is the utilization of pseudoscience by promoters. They may employ misleading or false scientific claims in their advertisements, making it challenging for consumers to distinguish between evidence-based information and unsupported claims.
2. Lack of Basic Scientific Understanding: The general public's limited understanding of science, particularly regarding how the human body functions, contributes to the dissemination of misinformation. Without a solid foundation in scientific principles, individuals may struggle to critically evaluate the accuracy and validity of health-related information they come across.
3. Spread of False Information and Mistrust: Promoters of certain products or alternative health practices may intentionally spread false information, which can foster distrust in the scientific community. This misinformation campaign can create confusion and skepticism among consumers, making it difficult for them to differentiate between reliable and unreliable sources.
4. Perceived Failure of Conventional Medical Care: Over time, some individuals may develop skepticism towards conventional medical care if they feel it has not significantly improved their health or addressed their specific concerns. This perception can lead them to seek alternative sources of information, sometimes from dubious sources, contributing to the propagation of misinformation.
It's important to note that the reasons mentioned above are not exhaustive, and other factors such as profit motives, media influence, and the complexity of nutrition and health science can also contribute to the prevalence of misinformation.
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Help!!
Cells of the skeletal system are specialized in their structure to store minerals. Which of the following is the function of these cells?
Produce chemicals that transmit signals.
Prevent the spread of disease in the organism.
Provide support to the body.
Absorb excess water released by digestion.
Answer: Provide support to the body.
Explanation:
The skeletal system is a system which is formed by the bones. The bones are important for the structure and function of the body. The bones are connected with the muscles to allow the movement of the body, and they protect the vital organs like heart, lungs, brains, and others. They provide support to the soft tissues, organs, and muscles of the body. They keep the human body upright. The skeletal system provide shape to the body. It provides support by acting as regions of attachment of soft body parts and muscles.
ANSWER ASAP:
What are the basic
needs of humans? What are basic needs of
animals? How are these similar or different?
Answer: 1. Human beings have certain basic needs. We must have food, water, air, and shelter to survive. If any one of these basic needs is not met, then humans cannot survive. 2. In order to survive, animals need air, water, food, and shelter (protection from predators and the environment); plants need air, water, nutrients, and light. Every organism has its own way of making sure its basic needs are met. 3.Humans and Animals both have similar social skills. ...
We have facial expression similar to that of a mouse. ...
We talk things while sleeping just like dolphins. ...
Just like Humans, Cows also have regional accents. ...
Dolphins, just like Humans get occasionally high.
Explanation:
which brain area is rich in neurons and uses norepinephrine?
The locus coeruleus (LC) is the part of the brain that is rich in neurons and uses norepinephrine (NE).
The locus coeruleus (LC) is the part of the brain that is rich in neurons and uses norepinephrine (NE). The LC is located in the dorsal pons and is responsible for a variety of physiological responses, including regulating attention, memory, learning, and emotional responses, and controlling arousal.
When an organism is exposed to a new, uncertain, or challenging environment, the LC becomes more active and releases more NE, increasing alertness and vigilance. On the other hand, when an organism is in a familiar, secure, or low-stress environment, the LC becomes less active and releases less NE, promoting relaxation and rest.
The LC-NE system is also involved in the stress response and the fight-or-flight response. During periods of stress, the LC-NE system is activated, leading to an increase in heart rate, blood pressure, and glucose metabolism, as well as a decrease in digestion, immune function, and sleep. In addition, chronic stress can lead to dysregulation of the LC-NE system and contribute to the development of anxiety and depression.
In summary, the locus coeruleus is a brain area that is rich in neurons and uses norepinephrine to regulate attention, memory, learning, emotional responses, arousal, stress, and the fight-or-flight response.
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Which of the following NOT beneficial association between fungi and humans? Act The The Fermentation An outbreak development development of of the fungal Saccharomyces yeasts mushroom pathogen antibiotic penicillin cultivation for an from the 1 agricultural peajq human fungal and system mold consumption alcoholic Penicillium beverages decomposers aq uatic ecosystems
The statement that is NOT a beneficial association between fungi and humans is an outbreak of a fungal pathogen in an agricultural system, option (A) is correct.
Fungal pathogen can cause devastating effects on crops, leading to reduced yields and economic losses. These pathogens can infect plants, leading to diseases such as blights, rots, and wilts. They can also affect stored agricultural products, causing spoilage and reducing their quality.
Outbreaks of fungal pathogens can have significant negative impacts on food production and security, as well as the livelihoods of farmers. Mushroom cultivation provides a nutritious food source, Saccharomyces yeasts contribute to the production of bread and alcoholic beverages, and the discovery of penicillin has revolutionized medicine by providing an effective antibiotic treatment, option (A) is correct.
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The complete question is:
Which of the following is NOT a beneficial association between fungi and humans?
A) An outbreak of a fungal pathogen in an agricultural system
B) The development of mushroom cultivation for human consumption
C) Fermentation by Saccharomyces yeasts to produce bread and alcoholic beverages
D) The development of the antibiotic penicillin from the fungal mold Penicillium
With regards to striping turf, place the following species in the correct order from easiest to most difficult.
___ Hybrid bermudagrass
___ St. Augustinegrass
___ Perennial Ryegrass
___ Turf-type tall fescue
When it comes to striping turf, the following species should be placed in the correct order from easiest to most difficult:
___ Perennial Ryegrass
___ Turf-type tall fescue
___ Hybrid bermudagrass
___ St. Augustinegrass
What is striping turf?
Striping turf is the process of mowing turfgrass in contrasting patterns, resulting in a striped lawn. Turfgrass stripe is the result of light reflecting off the turfgrass blade's various angles, producing a dark and light effect that gives the stripes their appearance. Striping can be done on any lawn but is most commonly done on large open spaces where the stripes can be seen easily.
Here are the species of turfgrass in the correct order from easiest to most difficult:
Perennial Ryegrass: Perennial ryegrass is easy to stripe, and its appearance can last up to three years. It is a cool-season grass that is ideal for winter sports fields, but it can be used as a permanent lawn.
Turf-type tall fescue: Turf-type tall fescue is a cool-season grass that is easy to stripe. Its dark green color is striking, making it a popular choice for golf course fairways.
Hybrid bermudagrass: Hybrid bermudagrass can be more difficult to stripe due to its fine blades and fast growth rate. It is a warm-season grass that is popular in the southern US due to its tolerance for heat and drought.
St. Augustinegrass: St. Augustinegrass has a thick, dense growth pattern that makes it challenging to stripe. It is a warm-season grass that is popular in the southern US due to its tolerance for shade and salt.
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Four students were asked to describe how three types of cells reproduce: a pollen cell, a leaf cell, and a human egg cell. Their responses are indicated in each row below.
Student Formation of a Pollen Cell Formation of a Leaf Cell Formation of a Human Egg Cell
Lexus Mitosis Mitosis Meiosis
Gabby Meiosis Meiosis Mitosis
Giovanny Mitosis Meiosis Mitosis
Breeanna Meiosis Mitosis Meiosis
Which student correctly identified how each cell reproduces?
A) Lexus
B) Gabby
C) Giovanny
D) Breeanna
Answer:Breeanna
Explanation:
During anaphase the chromosomes line up ?
True or false
Use the image below to answer items a and b.
The cells in this image of the microscope's field of view are most likely from a(n) ?
Α - bacterium
B - plant
C - protist
D - fungus
Answer:
A
Explanation:
i go with A is that okay?
huh
Some evidence on the safety of vaccines.
Answer:
The safety and effectiveness of vaccines are under constant study. Because vaccines are designed to be given routinely during well-child care visits, they must be extraordinarily safe. Safety testing begins as soon as a new vaccine is contemplated, continues until it is licensed, and is monitored indefinitely after licensure.
Explanation:
Answer:
well
Explanation:
Before a vaccine is ever recommended for use, it’s tested in labs. This process can take several years. FDA uses the information from these tests to decide whether to test the vaccine with people.
During a clinical trial, a vaccine is tested on people who volunteer to get vaccinated. Clinical trials usually start with 20 to 100 volunteers, but eventually include thousands of volunteers. These tests can take several years and answer important questions like:
How does the color adaptation help fish residing in the coral reefs?
Answer:
Fish found in coral reefs also have bright coloring to help with mating or camouflage. Due to the wide variety of prey found in coral reefs, the fish have developed a generalized feeding structure to take advantage of the biodiversity. Lastly sessile animals, such as coral, have adapted toxins to keep away predators.
Explanation:
Answer:
Many fish have color patterns that help them blend in with their environment. This may allow the fish to avoid being seen by a predator. Some fish, such as the flat fishes (Pleuronectiforms) , can change their skin coloration to match the surrounding habitat. Fish can also have disruptive markings to hide body parts
Explanation:
human speech consists of a series of sounds called ____, roughly corresponding to the sounds of each letter of the alphabet
Human speech consists of a series of sounds called phonemes, roughly corresponding to the sounds of each letter of the alphabet.
Human speech consists of a series of sounds called phonemes, roughly corresponding to the sounds of each letter of the alphabet. Phonemes are the smallest unit of sound that can change the meaning of a word. For example, the difference between "cat" and "bat" is the sound of the first letter, which represents the phoneme /k/ or /b/.There are approximately 44 phonemes in English, although the exact number can vary depending on the dialect or accent. These phonemes can be combined to form syllables, words, and sentences, allowing humans to communicate complex ideas with one another. The English alphabet, which has 26 letters, represents some but not all of the phonemes found in the language. Some letters, such as "c," "q," and "x," can represent multiple phonemes depending on the word they are used in. Other sounds, such as the glottal stop (represented by the symbol /ʔ/), do not have a corresponding letter in the English alphabet. Humans have been using speech as a means of communication for thousands of years, and the development of the alphabet has allowed for a standardized way of representing the sounds of human language.
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During normal breathing, what is the usual stimulus for a person to take a breath?
a. a decrease in pH of the cerebrospinal fluid
b. stimulation by norepinephrine
c. PCO2 in the blood drops below 40 mmHg
d. PO2 in the blood drops below 100 mmHg
Answer:
a
Explanation:
What three properties of water cause the oceans to change temperature so
slowly?
Answer:
because it has highest specific heat capacity
are lymphocytes acquired or natural immunity?
Answer:
Lymphocytes are acquired immunity
In your opinion, what are the Pros (benefits) of knowing if I had a genetic disorder, or high likelihood of developing it and what are the Cons (drawbacks) of knowing??
Answer:
It offers insight: With genetic testing, “we’re targeting the coding part of the gene that is relevant to your particular disease,” Aatre says. That, she notes, involves reading a DNA sequence from start to finish to see if there are any “interruptions/disruptions” — mutations associated with the disease in question — that stop the gene from making normal proteins.
Testing can be costly: The price of genetic testing ranges from a few hundred dollars to several thousand dollars. “They’re cheaper than they used to be but are still very expensive,” Aatre says. Still, insurance typically covers such tests for newborns and expectant mothers, as well as patients with a documented personal or family history or a physician’s recommendation.
Explanation:
one pro one com mark me brainlest
Identify from the following list which examples are controlled experiments. You make two pitchers of lemonade and
-only change the amount of lemonade mix you add.
-only change the amount of water you add.
-change both the amount of water and the amount of lemonade.
The answer is A&B
Why should the general public be concerned about the survival of honeybees
Answer: honeybees are one of the most important pollinators in the world, we do have others but without bees many crops, and plants will die and that will result in animals dying.
Explanation:
what makes one organism different from any other organism
Answer:
Their DNA.
Explanation:
Our DNA is the blueprint of how we are made. This separates us from other organisms.
Answer:
because of DNA and non similarities inherited by the parent
How does ovolution lead to both biodiversity and commonalities among
life?
Answer:
Evolution leads to biodiversity by changing the genetic code of organisms. When evolution leads to biodiversoty its called natural selection. It slowly decreases the popluation of organisms that are less adapted to survive in the world, and increas the population of more strong and adaptable organisms.
For example if there is a pink bird and a white bird, the white bird's population will increase due to its adaptation of camoflauge, and the pink bird will die out because it will be spotted by predators easily. Therefore the species of the white bird will become more common
Explanation:
Briefly describe the organelle modifications the following cell types have based on their function (i.e., the numbers of organelles): Skeletal muscle cells Cells in the small intestines that will be absorbing nutrients Pancreas cells making insulin
Skeletal muscle cells have an increased number of mitochondria and an extensive network of the sarcoplasmic reticulum, while small intestine cells involved in nutrient absorption possess numerous microvilli and an extensive network of ER and Golgi apparatus.
Skeletal muscle cells, responsible for generating force and facilitating movement, possess unique organelle modifications that suit their function. These cells contain an increased number of mitochondria, the powerhouse of the cell, which generate ATP to fuel muscle contractions.
The abundance of mitochondria ensures a continuous supply of energy to meet the high demands of muscle activity. Additionally, skeletal muscle cells possess an extensive network of sarcoplasmic reticulum (SR), a specialized type of endoplasmic reticulum (ER). The SR stores and releases calcium ions, crucial for muscle contraction and relaxation.
Cells in the small intestines that are involved in nutrient absorption exhibit specific organelle adaptations to maximize their efficiency. These cells feature numerous microvilli, tiny finger-like projections on their surface that greatly increase their surface area. This enlarged surface area allows for enhanced absorption of nutrients from the digested food passing through the intestines.
Moreover, these cells contain an extensive network of endoplasmic reticulum (ER) and Golgi apparatus, which are involved in protein synthesis, modification, and transport. These organelles facilitate the production and release of digestive enzymes and transport proteins necessary for nutrient absorption.
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all gpcrs share a similar structure composed of seven transmembrane helices. true false
The statement given "all gpcrs share a similar structure composed of seven transmembrane helices. " is true because all GPCRs share a similar structure composed of seven transmembrane helices" is true.
GPCRs, or G-protein coupled receptors, are a large family of cell surface receptors that play a crucial role in cellular signaling. These receptors share a common structural characteristic of having seven transmembrane helices, which are alpha-helical segments that span the cell membrane. The seven transmembrane helices are arranged in a bundle-like fashion and create a pocket within the cell membrane where ligands can bind and initiate signaling cascades.
This common structural feature of GPCRs is essential for their function and allows them to interact with intracellular G proteins and transmit signals across the cell membrane.
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When a dog chases a rabbit, which combination of body systems work together to supply the animals' muscle cells with the materials they need for energy?
A.Excretory, nervous, digestive
B.Muscular, circulatory, immune
C.Integumentary, digestive, endocrine
D. Digestive, circulatory, respiratory
True or False:Sunlight and the force of gravity are essential components to the water cycle
A. True
B.False
PLS SOMEONE I NEED HELP I WILL GIVE POIHTS AND I WILL MARK BRAINLIEST I WILL DO ANYTHING JUST PLS SOMEONE ANSWER ALL OF THIS I NEED THIS DONE ASAP PLS PLS PLS IM DESPERATE IM USING MY LAST POINTS ASKING THIS QUESTIONS SO PLS HELP ME
1. a) father (Rr), mother (rr)
b) from the attached file(1)
c) the possible genotypes are
Rr - 50%rr - 50%d) but from the information given above the only possible genotype for SpongeGerdy is Rr, because we were told that she was squarepants
e) Rr
f) from the attached file(2)
g) the possible genotypes are
RR - 25%Rr - 50%rr - 25%h) the genotypes for squarepants are RR and Rr
therefore probability is (25 + 50)% = 75% or 3/4
i) the only genotype for roundpants is rr
therefore probability is 25% or 1/4
2. a) wilba - Ee , wilbur -EE
b) from the attached file(3)
c) the possible genotypes are
EE - 50%Ee - 50%d) the genotypes for round eye are EE and Ee
therefore probability is (50 + 50)% = 100% or 1
e) the only genotype for oval eye is ee
therefore probability is 0
3. a) squidward - BB . squidette - bb
b) from the attached file(4)
c) the only possible gene is Bb - 100% or 1
d) the genotypes for a light blue skin are BB and Bb
therefore probability is (0 + 100)% = 100% or 1
e) the only genotype for a light green skin is bb
therefore probability is 0
f) No, they are not. this is because they are heterozygous i.e.( they carry gene for a light green skin)
g) from the attached file(5)
h) the possible genotypes are
BB - 25%Bb - 50%bb - 25%i) the genotypes for a light blue skin are BB and Bb
therefore probability is (25 + 50)% = 75% or 3/4
j) the only genotype for a light green skin is bb
therefore probability is 25% or 1/4
________protects coding sequences at the 5' end of mrna from degradation.
The cap structure or Capping protects coding sequences at the 5' end of mRNA from degradation.
The cap structure refers to a modified nucleotide structure added to the 5' end of eukaryotic mRNA molecules during transcription. It consists of a modified guanine nucleotide (known as the 7-methylguanosine cap) attached to the mRNA via a unique linkage. This cap structure plays several important roles, including protecting the mRNA from degradation by exonucleases.
Exonucleases are enzymes that degrade RNA molecules by cleaving nucleotides from the ends. By adding the cap structure to the 5' end of mRNA, it provides protection by preventing exonucleases from recognizing and degrading the mRNA from this end. Additionally, the cap structure is involved in other processes such as mRNA export from the nucleus, translation initiation, and recognition by the ribosome during protein synthesis.
In summary, the cap structure protects coding sequences at the 5' end of mRNA from degradation by exonucleases and plays crucial roles in mRNA stability and translation.
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3. Compare and contrast the movement produced by each of the three types
Answer:
strike-slip is when the blocks have mostly moved horizontally, normal is when a dip-slip fault in which the block above the fault has moved downward relative to the block below, and thrust is when the hanging wall moves up relative to the footwall.
There are three faults. Normal faults originate from the divergent boundary. Reverse faults originate from the convergent boundary. Strike-slip fault originate from transforming boundary.
What are the three types of fault?We can differenciate three types of faults,
Normal fault ⇒ originate from divergent movementReverse fault ⇒ originate from convergent movementStricke-slip fault ⇒ originate from transforming movementWhat are the boundary types?I. Divergent:
This boundary occurs when two plates separate and molten material rises from the mantle creating a new crust.
The hot material creates a new seabed between the separating plates, expanding the sea bottom.
II. Convergent.
Collision area between two plates. Two oceanic plates might collide, or one oceanic plate with a continental one.
In this last case, the oceanic crust sinks under the continental plate, and magma rises to the surface by crevices.
The thicker and older plate subduces under the other plate.
III. Transforming.
The plates slide laterally with each other, and they are usually called faults.
It is associated, in general, with the oceanic ridge, although it might also occur in the continental plate.
No rocky material is either destroyed or formed.
When the plates move and produce a displacement of one transforming limits from side to side, earthquakes occur.
The movement breaks the crust and originates pronounced fractures.
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